Hapstone Spring Assisted Stopper Ring PairThis product is an optional upgrade for the Hapstone M2, M3, R1, R2, V5, V6 and V8 sharpening systems. Easily install the Spring Assisted Stopper by securing it onto the rod using the screw provided, the stopper can be adjusted for your desired travel length. Invest in the Hapstone Spring Assisted Stopper for a safer and more controlled sharpening experience.
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